Furnace



11,477,896 H. A. POPPENHUSEN ET AL Deg. 18

FURNACE Filed Jan. 23'. 1922 HT 251 gl,t777,ttt

rear oserea.

HERMAN A. POPPENHUSEN, OF HAMMOND. INDIANA, AND ARTHUR P. STRONG, OF

CHICAGO, ILLINOIS, ASSIGNORS TO GREEN ENGINEERING COMPANY, OFEAST CHI-CAGO, INDIANA, A CORPORATION OF ILLINOIS.

romance.

Application filed January 23, 1922. Serial No. 581,375.

To all whom it may cmwem:

Be it known that we, HERMAN A. PorrnN- HUSEN and ARTHUR P. STRONG, bothcitizens of the United States, residing,respectively,

State of Indiana, and Chicago, in the county of Cook and State ofIllinois, have invented new and useful Improvements in Furnaces, ofwhich the following is a specification.

This invention relates to furnaces, and more particularly to furnacesequipped with mechanical stokers, such as chain grates, and providedwith vertical air ducts at the sides of the grate for supplying theactive grate surface from below with a forced draft delivered to thegrate between the upper and lower leads thereof. 1

One object of our invention is. to provide means beneath the activegrate surface and in the path of air flow for directing the air upwardtoward the grate at' a plurality of spaced points for placing allportions of the grate under an active and eflicient draft.

Another object-of our invention is to make said means adjustable so thatthe amount of draft'delivered to the various sections of the grate maybe regulated to suit the'kind of fuel being handled, the rate of feedthereof through the combustion chamber on the grate, andthe distance ofthe fuel sections from the draft inlet. a

A further object of our invention is to provide said means. in the formof bafie mounted beneath said grate surface, and also to vary thevertical height of said plates and'to arrange, the ones greatest inheight farthest from the draft inlets.

The invention consists further in the matlarly set forth in the appendedclaims.

In the accompanying drawings- Fig. 1 is a transverse, vertical sectionalview of a furnace embodying the features of our invention;

Fig. 2 is a longitudinal sectional view taken on line 22.of Fig. 1;

Fig. 3 is a view of a detail of construction to be hereinafterdescribed; and

Fig. 4 is a vertical sectional view taken on line 4-4; of Fig. 3.

In the drawings, there is shown a furnace of the type embodying amechanical stoker, such as a chain grate 1 located in the combustionchamber of the furnace and having upper and lower leads 2 and 3. Saidgrate 5 at Hammond, in the county of Lake and 1 extends into saidcombustion chamber ends with a main supply conduit 6 located beneathvthe lower lead 3 and arran ed between said ducts 5, as shown. ingeoldamper plates 7, 7, one for each vertical duct 5, control the supply ofdraft to the vertical ducts 5 from the main supply conduit 6. Thedampers 7, 7 are connected by rods 8, 8 with a rock shaft 9 through arms10, 10 on the same, for swinging the dampers open and closed, the sameas shown and described in detail in, the pending a plication filedDecember 14, 1921, Serial 0. 522,361, by Herman A. Poppenhusen.

The space between the grate leads 2 and 3 is divided transversely into aplurality of compartments 11, 11, as shown in Fig. 2. These compartments11, 11 open at the sides of the grate into the associated vertical ducts5, and receive draft from opposite sides of plates, vertically arrangedand pivotally the grate through said ducts. The flow of air into eachcompartment 11 from its side ducts 5, 5 is in a plane substantiallyparallel to the grate leads 2 and 3. These compartments 11, 11 areformed by transverse channel members 12,12, which fit up against tershereinafter described and more particuthe under sides of the skids 13-,13, laterally spaced apart and extending lengthwlse of the grate 1. Saidskids 13, '13 support the upper grate lead 2, as shown. In connectionwith the channel members 12,12, thereare shoes 14, 15 bearing,respectively, against the grate leads and forming air seals be theirouter ends, as shown.

as shown in Fig. 1. This makes the plates in each compartment 11 spacedapart length- Wise of the compartment the same distance as are theskids. The plates are arranged in sets on opposite sides of thelongitudinal center line of the grate 1, and in the construction shownin the drawings there are three of such plates 16, 17, and 18 on eachside of such center line and with the plates decreasing in height fromthe center plates 16 outward toward the sides of the grate.

rods -19, 19 extending lengthwise of the grate between the upper andlower leads thereof and through the several channel members 12. Theplates are secured to said rods by straps 20, 20, as shown in Figs. 1and 2. To swing-the plates about the rods 19 and thus adjust the platesfor the purpose to be presently described, adjusting rods 21, 21 areprovided, one for each plate and connected at its inner end thereto. Therods 21, 21 for one set of plates extend outward through one side of thefurnace and the rods for the other set extend beyond the other side ofthe furnace, as shown in Fig. 1. These rods extend across theirassociated vertical ducts 5 and out through holes 22 in the door frames23. To hold the rods 21 inany position of endwise adjustment, they haveteeth 24 on their under sides at the holes 22 to engage the upper edgesof plates 25 secured to the frames 23, as shown in Figs. 3 and 4. Tofacilitate grasping and moving said rods, they have handles 26 at Thesupply of air to the compartments 11, 11 from the conduit 6 is aroundthe sides of the grate 1 through the vertical ducts 5, 5. The flow ofair into each compartment 11 is thus from opposite sides of the grateand toward the center thereof in a general direction substantiallyparallel to the grate leads 2 and 3 and between them.- The plates 16 to18in each compartment beingin the path,

2 and through the fuel bed carried thereon at a velocity suflicient tosupply-the fuel bed with an active and efficient draft. The plates 16 to18 thus act to scoop the air from the incoming air streams and direct ittoward and through the fuel bed. Thus the likelihood-of the twoairstreams meeting at .the centerof the-grate and being directed ous gratesections over the compartment 11,

may be varied and regulated to suit the actual working conditions of thefurnace, depending on the kind of fuel beino' handl d and the rate offuel feed.

While we have shown and described herein in detail av structureembodying the features of our invention, it is of course understood thatthe details of construction and arrangement of parts illustrated may bevariously changed and modified without departing from the spirit andscope of our invention. I

We claim as our invention:

1. In a furnace, the combination of a grate, a plurality of compartmentsbeneath the fuelsupporting portion of said grate and opening upwardtoward the same throughout their lengths, means for supplying an to saidcompartments, and means in each compartment and arranged along thelength thereof for directing varied amounts of draft toward differentareas of said grate thereover.

2. In a furnace, the combination of a grate, means for supplying air tothe under side of the fuel supporting portion of said grate fromopposite sides thereof and in a plane substantially parallel thereto,and

.a plurality of vertically arranged bafiie plates beneath said grateportion and between the air inlets at the sides thereof, said platesvarying in vertical height and being arranged transverse to the incomingair streams from said inlets for directing varied amounts of drafttoward different areas of said grate portion for placing the same underdraft.

3. In a furnace, the combination of a grate, means for supplying air tothe under side of the fuel supporting portion of said grate fromopposite sides thereof and in a plane substantially parallel thereto, aplurality of vertically arranged baflie plates pivotally mounted beneathsaid grate 1'- tion and between the air inlets at the sides thereof,said plates being arranged transverse to the incoming air streams fromsaid inlets for directing the air toward different areas of said grateportions for placing the same under draft, and means for adjusting-beneath said grate portion and between the I air inlets at the sidesthereof, said plates recting varied amounts of air toasaid gratebeingarranged transverse to the incoming air streams from said inlets fordirecting the air toward difierent areasof said grate portion forplacing the same under draft, said plates being arran (1 one behind theother and increasing in eight from the air inlets toward the center ofthe grate for diareas.

5. In a furnace, the combination of a grate, means for supplying air tothe under side of the fuel supporting portion of said grate fromopposite sides thereof andina plane substantially parallel thereto, aplurality of vertically arranged baflle plates pivotally mounted beneathsaid grate and between the air inlets at the sides thereof, said platesbeing arranged transverse to the incoming air stream from said inletsfor directing the air toward different areas of' said grate portion,said plates increasing in vertical height from the air inlets toward thecenter of the grate, and means for adjusting said plates independentlyof each other for varying the amounts of air supplied to said grateareas.

6. In a furnace, the combination of a. grate, a plurality of transversecompartments beneath the fuel supporting portion of said grate andopening upwardly toward the same, means for supplying air to saidcompartments from one side ofthe grate, and a plurality of verticalbaflle plates in eachcompartment and arranged transverse to the air flowfor directing the air toward different areas of the grate portion oversaid compartment, said plates varying in vertiw cal height fordelivering different amounts of draft to said grate areas.

7. In a furnace, .the combination of a grate, a plurality of transversecompartments beneath the fuel supporting portion of said grate andopening upwardly toward the same, means for supplying air to saidcompartments from one side of the grate, a plurality of vertical baflleplates pivotally mounted in each compartment and arranged transverse tothe air flow for directing the air toward different areas of said grateover said compartment, and means accessible from the exterior of thefurnace and connected with said plates for adjusting the sameindependently of each other for varying the amounts of draft supplied to.th grate areas.

8. In a furnace, the combination of a grate, a plurality of transversecompartments beneath the fuel supporting portion of said grate andopening upward toward the same, means for supplying air to saidcompartments from opposite sides of the grate, and a plurality ofvertical bafile plates in each compartment and arranged transverse tothe incoming air streams from opposite sides of the grate, said platesin each compartment increasing in height from the air inlets toward thecenter of the grate for directing various amounts of air towarddifferent areas of the grate portions over said compartments. p 9. In afurnace, the combination of an endless chain grate having upper andlower leads, skids extending longitudinally of said grate beneaththeupper lead thereof for supporting the same, means for dividing thespace between said grate leads into. a plurality of compartments openingupward- 1y toward said upper lead, baflle plates in said compartmentsand arranged one beneath each of said skids, said plates extendingdownward from said skids and terminating short of the lower grate lead,means for pivotally mounting said. plates beneath said skids, meansaccessible from the exterior of the furnace and connected with 1% saidplates for adjusting the same about their pivots independently of eachother, and means for supplying air to said compargments around the sidesof the lower lea 10. In a furnace, the combination of an endless chaingrate having upper and lower leads, skids extending longitudinally ofsaid grate beneath the upper lead thereof for supporting the same, meansfor' dividing 111?) the space between said grate leads into a pluralityof compartments opening upwardly toward said upper lead, baflle platesin said compartments and arranged one be neath each of said skids, saidplates extend- 1155 ing downward from said skids and terminating shortof the lower grate lead, rods extending longitudinally of said gratethrough said compartments and beneath said skids, means co'nn'ectingsaid plates to 1% said rods, rods extending through the sides of thefurnace and connected with said plates for adjusting the sameindependently of each other about said rods, and means for supplying airto said compartments about the sides of the lower lead.

- 11. In a furnace, the combination of an endless chain grate havingupper and lower .leads, means dividing the space between versecompartments opening upwardly toward said upper lead, vertical air ductsat opposite sides of said grate for supplying air to said compartments,a mainsupply conduit beneath said lower lead and common to all ofsaid'vertical ducts for supplying air thereto, and means in each 'ofsaid compartments for directing the air to difierent areas of the upperlead over said compartments.

In testimony that we claim the foregoing as our invention, we aflix oursignaturesv this 20th day of January, A. D. 1922.

HERMAN A. POPPENHUSEN. ARTHUR P. STRUNG.

